Xanthan gum is a common food additive and is also used in pharmaceuticals and cosmetics. It is a polysaccharide produced by bacterial fermentation and has the functions of thickening, emulsifying, stabilizing emulsions and adjusting viscosity. In the food industry, xanthan gum is often used as a thickener and stabilizer and can be used to make various foods, such as sauces, salad dressings, ice cream, bread, etc.